Need help understanding a topic? Khanacademy.org is a website run by Salman Khan and he is amazing! He is extremely good at explaining topics, and makes videos where he walks you through the problems step by step. There are videos for...
Mathematics (Arithmetic, Algebra, etc. all the way up to Calculus)
Science (Biology, Chemistry, Physics, etc.)
California Standards for Algebra (good preparation for CST)!
Banking & Money
Watch YouTube Videos by user "YayMath"
https://www.youtube.com/user/yaymath
Notice that he is listening to your question already...